VULNERABILITY INTELLIGENCE

CVE-2026-21238

CVSS score7.8 HIGH
EPSS probability3.38%
CISA KEVNot currently listed
Published2026-02-10
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Description

Improper access control in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

Weakness classification

  • secure@microsoft.com: CWE-284

Primary references